Steam-turbine.



K. BA UMANN.

STEAM TURBINE.

APPLICATION FILED AUG.24. 19H.

1,32,83 Patented Apr. 29,1919.

' 2 SHEETS-SHEET I.

INVENTOR K. BAUMANN.

STEAM TURBINE.

APPLICATION HLED AUG.24.1911.

Patented Apr. 29, 1919.

2 SHEETSSHEET 2.

INVENTOR' flank/ W pairs sna e ATJEN union,

KARL BAUMANN, 0F URMSTON, ENGLAND, ASSIGNOR TO THE BRITISH WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY LIMITED, A COMPANY ORGANIZED UNDER THE LAWS OF GREAT BRITAIN.

STEAM-TURBINE.

isoaess.

Application filed August 24, 1917.

To all whom it may concern Be it known that I, KARL BAUMANN, a citizen of the Confederation of Switzerland, and a resident of Urmston, in the county of Lancaster, England, have invented a new and useful Improvement in or Relating to Steam-Turbines, of which the following is a specification.

This invention relates to steam chests for steam turbines and more particularly to steam chests of the kind in which a plurality of governor or hand controlled valves are provided for regulating the supply of steam to a plurality of nozzle boxes or steam admissions.

The invention has for one of its objects to provide an improved steam chest especially adapted to supply large quantities of steam to the turbine.

Another object of the invention is to provide an improved steam chest the construc tion of which is such that the casting or castings of which it is composed are simple and not liable to casting stresses or to stresses due to differences in expansion under operating conditions.

According to the present invention the improved steam chest comprises two chambers, one located within the other with a space between them divided into a number of compartments which may conveniently be formed by ribs cast either on the exterior of the inner chamber or on the interior of the outer chamber, or on both, for simplicity in manufacture the inner and outer chambers, being preferably cast separately. Ports are provided leading from the inner chamber into the several compartments thus formed between the two chambers. In the preferred construction two ports diametrically opposite one another are provided leading from the inner chamber into each of said compartments. These ports are controlled by double beat valves which govern the flow of steam from said chamber into the compartments. Said compartments are respectively connected to the various nozzle boxes or steam admissions of the turbine, the inner chamber being connected to the steam supply either at one or both of its ends or through one or more of the aforesaid chambers.

In the accompanying drawings Figure 1 is a central, longitudinal section, Fig. 2 a plan view and Fig. 3 a sectional view taken Specification of Letters Patent.

Patented Apr. 29, 1919.

Serial No. 187,964.

on the line IIIIII of Fig. 1, of one form of steam chest constructed in accordance with this invention, one of the valves being shown in place in Fig. 1 only. Fig. 4 is a central, longitudinal section and Fig. 5 a section on the line VV of Fig. 4 of another form of steam chest also constructed in accordance with this invention.

Referring now to Figs. 1 to 3, the steam chest is shown as consisting of an outer chamber 6 and an inner chamber 7, the interior of the outer chamber 6 and the exterior of the inner chamber 7 being provided with a plurality of circumferential ribs 8, 9, 8, t! which register in position nd meet to divide the space between the two chambers into a plurality of separate compartments 10, 11 and 12. Ports 18, 14 and 15 provide com munication between the interior of the inner chan'lber 7 and the compartments 10, 11 and 12 respectively. Said ports 13, 1 1 and 15 are controlled by double-beat valves, only one valve, 16 however being shown in Fig. 1 controlling the ports 13. Said valves may be actuated either manually or automatically by the governor as may be desired. A passage 17 leads from the compartment 10 and other passages 18, 19 lead respectively from compartments 11 to 12 by means of which the several compartments are respectively connected to the various nozzle boxes or steam admissions of the turbine.

In operation steam isadmitted to the interior of the inner chamber 7, as indicated by the arrow in Fig. 1, and, assuming the valve 16 to be open and the valves controlling the other ports 14:, 15 closed, will pass through the ports 13 into the chamber 10 and from thence through the passage 17 to the nozzle box or steam admission of the turbine with which this passage is connected. As the load on the turbine increases the valve controlling the ports 14 will be opened and steam will then also pass from the interior of the chamber 7 to the compartment 11 and passage 18 to another part of the nozzle box or boxes or steam admissions of the turbine. Similarly with a further increase of load the valve controlling the ports 15 will be opened and steam will then also pass through the passage 19 to the turbine.

In Figs. 4 and 5 the inner chamber 7 is, as will be seen, conical in shape decreasing in cross-section as it recedes from that end of said chamber at which the steam is admitted, as indicated by the arrow. In the term shown in Figs. a and 5 a larger number of compartments are formed from which passages lead to the various nozzle boxes or steam admissions of the turbine. It is to be understood, however, that neither form of the invention is in any way limited to the number of compartments as the number of these will depend upon the number of steam admissions of the turbine and the arrange ments provided for regulating the supply of steam in accordance with the load on the turbine.

Although, as illustrated and described above, the preferred construction is that in which two ports located diametrically opposite each other and controlled by a doublebeat valve are employed, the invention is not limited to this arrangement as either a double or a single-beat valve controlling a single port leading into each of the compartments may be employed if desired.

I claim as my invention:

1. In a steam chest for steam turbines, an outer casing, an inner casing formed separately from the outer casing and spaced therefrom, partitions between said casings dividing the space therebetween into a plurality of compartments adapted to be re spectively connected to various nozzle boxes or steam admission ports of the turbine, valve seats in said inner casing and valves cooperating with said seats for controlling the flow of steam from the interior of the inner casing to said compartments.

2. In a steam chest for steam turbines, an. outer casing, an inner casing formed sepa rately from and spaced apart from the outer casing, partitions between said casings and partially formed on each for dividing the space between said casings into compart ments adapted to be connected to nozzle boxes or steam admission ports of the tnr bine.

3. In a steam chest for steam turbines, an outer casing provided with steam outlet ports and inner annular flanges, and an inner casing provided with a central steam passage, steami outlet ports and annular flanges adapted to register with the annular flanges of said outer casin 4.. In a steam chest for steam turbines, an outer casing provided with interior flanges, an inner casing provided with a central steam space and with exterior flanges adapted to register with said internal flanges.

5. In a steam chest for steam turbines, a substantially cylindrical outer casing pro vided with annular internal flanges, an interior casing having a central steam passage of decreasing cross section from its outer to its inner end and provided with external annular flanges registering with the internal flanges of the outer casing.

6. In a steam chest for steam turbines, an

outer casing provided with an outlet port and internal flanges, an inner casing provided with outlet ports and external flanges adapted to register with said internal flanges, said inner casing having a centrally located steai'n passage which from the inlet end thereof to the end remote therefrom decreases in cross sectional area.

7. In a steam chest for steam turbines, an outer casing provided with a steam outlet port, an inner casing formed separate from the outer casing and spaced therefrom, one of said casings having ribs extending there from to the other casing forming a plurality of separate chambers between said casings. the inner casing being provided with oppositely disposed openings for the reception of valves, and valves in said openings for con trolling the passage of steam from the interior of the inner chamber to said compart ments.

In testimony whereof I have hereunto sub scribed my name this tenth day of July 1917.

KARL B All MANN.

Vitnesses WILFRED Monms, Fnnonnron I'IIXON.

Copies of this patent may be obtained for five cents each, by addrening the Commissioner of Patents, Washington, D. C. 

